Air circulating fan



Dec. 4, 1945. LA GU'TK N 2,390,299

AIR CIRCULATING FAN Filed Dec. 9, 1941 Patented Dec. 4, 1945 AIRCIRCULATING FAN Louis A. Gutkin, Winnipeg, Manitoba, Canada ApplicationDecember 9, 1941, Serial No. 422,283 In Canada December 9, 1940 1 Claim.(o1. 170-173) late air in any place where machines are located and aredriven by shafting. The invention applies particularly to power drivensewing machines locatedin garment workrooms which are frequently poorlyventilated.

A further object of my invention is to provide a device in which the fanblades may be adjusted at an angle to the axis of rotation of the fan sothat where desired a certain volume of air may be pulled into the fanupon one side or other of the blades.

A further object of my invention is to provide a device of th characterherewithin described which is simple to manufacture, which does notrequire any substantial outlay in too-ls or dies, which can bemanipulated by anyone, which cannot easily break and which can bepurchased for a very low price.

With the above more important objects in view and such other minorobjects as may appear as the specification proceeds, my inventionconsists essentially in the arrangement and construction of parts all ashereinafter more particularly described, reference being had to theaccompanying drawing, in which:

Figure 1 is a perspective illustration of my fan upon a piece ofline-shafting.

Figure 2 is an end view of my fan, showing the blades partially broken.

Figure 3 is a a, plan of one of the blades used in forming the hub of myfan.

Figure 4 is a plan of the other blank used in forming the hub of my fan.

Figure 5 is a sectional detail illustrating the means by which I wouldrender my fan blades adjustable in an alternative embodiment of myinvention.

Figure 6 is a perspective detail illustrating one of the radiallyserrated nuts or washers I would employ in making my fan bladesadjustable.

Figure 7 is a perspective detail illustrating the manner in which theblades would be attached to the adjustable blade embodiment illustratedin Figure 5.

In the drawing like characters of reference indicate corresponding partin the different figures.

The power-driven sewing machines used in earment workshops are usuallypositioned on either side of a channel, along which extends thelineshafting I used to operate the machines. The air in such workshops,particularly in hot weather, frequently becomes very stagnant, thuspreventing evaporation of moisture from the bodies of the workers,frequently impairing theirefiiciency through discomfort to such anextent (in hot weather) that the workers have to quit comparativelyearly in the day, or at least have to take time to cool off, thuscutting down considerably their earning power to themselves and to theiremployers.

In this context it should be borne in mind that garment workrooms aregenerally located in old buildings which are not air conditioned for thereason that the economics of the trade pr0.. hibit the payment of rentswhich would be required in new air conditioned buildings.

My invention therefore, provides an inexpensive means whereby anyindividual worker who feels the need for circulating the air in hisvicinity, may do so by attaching the fan herewithin described andillustrated upon the accompanying drawing, to the line-shafting whichrotates in the channel in front of him.

My fan comprises the blades 2 and a hub 3, the blades beingapproximately the shape illustrated, although obviously any shape may beused, and these blades will preferably be formed of light material, suchas one or other of the varietie of building board, a plastic, a lightmetal alloy, or any suitable material whatsoever.

The hub of my fan is formed from two shaped blanks 4 and 5 into acylindrical clip having a pair of finger wings 6, which may bemaniplated by the worker to attach the fan to the shafting or detach itfrom the same.

Considering first the blank 4 illustrated in the accompanying Figure 3,it will be seen that the same embodies one of the finger wings 6 whichis ribbed for stiffness along its edges, and a pair of projections Iwhich are turned as at it in the accompanying Figure 2, to form part ofthe hinges through which a pin 9 extends.

Centrally upon the edge In of the blank 4 is an upwardly projectingportion H provided with a pair of apertures I2 and to this, one of theblades 2 is attached, as by means of rivets or eyelets l3.

A second projection I4 is punched up from the body of the blank and isprovided with a similar pair of apertures and to this, another of theblades is attached.

The blank 5 also has a pair of projecting pieces l5, which are turned.to form the inner part of a and also, readily detached therefromwithout 1 stopping the shaft and here I would point out that suitablysecured to the inner surface of my hub, is a piece of friction lining[9, such as rubber or the like, to prevent undue slippage of the fan onthe shaft. f

To render the blades 2 adjustable, I modify the blanks E and 5 byeliminating the portions ll, l4, and i1, and providing in their place,apex" tures. through each of which extends a bolt 20 and by reference tothe accompanying Figure 5, it. will be seen that the portion of myblanks around the aperture through which the bolt 20 .eiitends is domedtov provide for the heads 2| of my bolts to countersink them into theblanks.

Screwed down on the bolt 20 is a radially serrated nut or washer 22 andengageable with this nut. orwasher is a similarl serrated nut orwasherfi 23, which latter is secured to a right-angled bracket Zlprovided with an aperture 25 in alignment with the central aperturewithin the nut .01- washer,

Over the foregoing isscrewed the conventional wing nut 26 and. byflattening oif the wing nut and setting the blade 2 to any desireddegree of angulation and then tightening the wing nut, it will beapparent that the blade will remain in the position sketched.

Preferably, I would provide the member 22 with a screw-threaded centralaperture and the member 23 with a plain cylindrical aperture somewhatlarger than the diameter of the bolt 20, but if desired, the diameter ofboth thesev member a e in. n in ex e s f the ameter of. the. bolt sincethe light weight fan blades 2 would still remain inplac'e'in any event,so long as the wing nut 26 were tight.

Since various modifications can be made in my invention as hereinabovedescribed and as illustrated in the accompanying drawing, and manyapparently widely different embodiments of same hub in the m a ndricalspring cli sm n age a piec of; l n -smi n at. ea two .blades securedradially, thereto, said bladesjbeing composed of light weight materialsuch. as will permit of the fan being, stoppedfromrotating. on. a.shaft. by the hand without injuryv and removed therefrom.

LOUIS A. GUTKIN.

